File - Science 8 core
... location of an earthquake 3. (a) Matching continental margins suggest the continents were once part of a single large continental mass. (b) Similar animal fossils suggest the continents were once together, because it is unlikely the same organism that produced the fossil would develop identically on ...
... location of an earthquake 3. (a) Matching continental margins suggest the continents were once part of a single large continental mass. (b) Similar animal fossils suggest the continents were once together, because it is unlikely the same organism that produced the fossil would develop identically on ...
Passing Plates II
... The one important finding by scientists about faults is that earthquakes tend to reoccur along faults. This makes sense because faults are areas where the earth's crust is the weakest. There used to be the belief that if stress were relieved on a fault, another earthquake would not occur. In fact, r ...
... The one important finding by scientists about faults is that earthquakes tend to reoccur along faults. This makes sense because faults are areas where the earth's crust is the weakest. There used to be the belief that if stress were relieved on a fault, another earthquake would not occur. In fact, r ...
Magnitude 7.7 SOLOMON ISLANDS
... trenches. Along with its location and depth, the thrust faulting mechanism of the M7.8 December 8, 2016 earthquake indicates that it occurred on the Solomon Trench subduction zone boundary. Two major earthquakes occurred in April 2014 on or near the left-lateral transform fault that connects converg ...
... trenches. Along with its location and depth, the thrust faulting mechanism of the M7.8 December 8, 2016 earthquake indicates that it occurred on the Solomon Trench subduction zone boundary. Two major earthquakes occurred in April 2014 on or near the left-lateral transform fault that connects converg ...
PowerPoint Presentation - The Earth, Plate Tectonics
... Tectonic Plates There are a dozen large lithospheric plates (smaller plates not shown). Some plates have continents; some don’t. All are in motion. Question: What evidence is there for these plate boundaries? ...
... Tectonic Plates There are a dozen large lithospheric plates (smaller plates not shown). Some plates have continents; some don’t. All are in motion. Question: What evidence is there for these plate boundaries? ...
Plate tectonics and the distribution of Earthquakes
... The subduction is a sudden burst and the focus can be up to 300km under the surface. They are usually 8 or 9 on the richter scale. When 2 continental plates collide, fold mountains are formed. (eg Himalaya Mountains) The creations of fold mountains cause shallow quakes. The focus can be only 70km un ...
... The subduction is a sudden burst and the focus can be up to 300km under the surface. They are usually 8 or 9 on the richter scale. When 2 continental plates collide, fold mountains are formed. (eg Himalaya Mountains) The creations of fold mountains cause shallow quakes. The focus can be only 70km un ...
Section 9.4 Testing Plate Tectonics
... Scientists found a close link between deep-focus earthquakes and ocean trenches • The absence of deep-focus earthquakes along the oceanic ridge system was shown to be consistent with the new theory. Ocean Drilling • The data on the ages of seafloor sediment confirmed what the seafloor spreading hypo ...
... Scientists found a close link between deep-focus earthquakes and ocean trenches • The absence of deep-focus earthquakes along the oceanic ridge system was shown to be consistent with the new theory. Ocean Drilling • The data on the ages of seafloor sediment confirmed what the seafloor spreading hypo ...
Getting to Know: Evidence for Plate Tectonics
... as a result of heat within the mantle. As the partially molten rock flows, the tectonic plates move as well. Sometimes the plates move away from each other, and magma underneath rises to fill the gap and form new crust. These are known as divergent boundaries. Other plates push against each other an ...
... as a result of heat within the mantle. As the partially molten rock flows, the tectonic plates move as well. Sometimes the plates move away from each other, and magma underneath rises to fill the gap and form new crust. These are known as divergent boundaries. Other plates push against each other an ...
Earthquakes, Volcanoes, tsunamis
... or pulls them apart, or pushes them in different directions. As tectonic plates move, they cause stress in the crust, which in turn produces faults and folds. Fault- break in a mass of rock along which movement occurs Fold- bend in layers of rock ...
... or pulls them apart, or pushes them in different directions. As tectonic plates move, they cause stress in the crust, which in turn produces faults and folds. Fault- break in a mass of rock along which movement occurs Fold- bend in layers of rock ...
Unit 6 Earthquakes and Volcanoes
... British scientist who calculated a mathematical model for a wave. L Waves are the fastest waves and move from ground to side to side. In other words, they are P or S waves that hit the surface. ...
... British scientist who calculated a mathematical model for a wave. L Waves are the fastest waves and move from ground to side to side. In other words, they are P or S waves that hit the surface. ...
Mrs
... 1. Earthquakes and volcanoes occur at plate boundaries, like the Ring of Fire. 2. Convection depends upon Density. Warmer material is less dense and rises. 3. Convection drives MANY things, such as atmospheric movement and convection in the mantle causing Plate movements. 4. Rising heat from convect ...
... 1. Earthquakes and volcanoes occur at plate boundaries, like the Ring of Fire. 2. Convection depends upon Density. Warmer material is less dense and rises. 3. Convection drives MANY things, such as atmospheric movement and convection in the mantle causing Plate movements. 4. Rising heat from convect ...
All About Earthquakes
... zone? What kinds of destruction are caused by earthquakes? What special problems occur when an earthquake hits in a city or other developed area? What should people do to be prepared for an earthquake? (standards by Dr. Sherrye D. Garrett, Texas A&M University-Corpus Christi) ...
... zone? What kinds of destruction are caused by earthquakes? What special problems occur when an earthquake hits in a city or other developed area? What should people do to be prepared for an earthquake? (standards by Dr. Sherrye D. Garrett, Texas A&M University-Corpus Christi) ...
Earthquakes, Volcanoes and Igneous Activity
... Location of an Epicenter Epicenters are located by using the velocity differences between the P-waves and 9waves. Since P-waves move faster than 9waves, the farther an observer is from an epicenter, the larger the time interval between the arrival of the P-waves and $waves. The distance to the epice ...
... Location of an Epicenter Epicenters are located by using the velocity differences between the P-waves and 9waves. Since P-waves move faster than 9waves, the farther an observer is from an epicenter, the larger the time interval between the arrival of the P-waves and $waves. The distance to the epice ...
2-Unit4Part2EarthsInteriors
... • It will then appear to move; relative to the shaking ground • As it moves, it records the pendulum displacement • The tracing is called a seismogram ...
... • It will then appear to move; relative to the shaking ground • As it moves, it records the pendulum displacement • The tracing is called a seismogram ...
How Do Stress Forces Affect Rock?
... Accurate measurements for small, nearby earthquakes not large, distant earthquakes ...
... Accurate measurements for small, nearby earthquakes not large, distant earthquakes ...
Seismographs - Ring of Fire Science
... and S waves at three stations. Scientists determining the distance they were from the focus of an earthquake would first write down the exact time the S waves arrived at the first station, which was 10:45 a.m. They would subtract the exact time the P waves arrived, which was 10:17 a.m. from the S wa ...
... and S waves at three stations. Scientists determining the distance they were from the focus of an earthquake would first write down the exact time the S waves arrived at the first station, which was 10:45 a.m. They would subtract the exact time the P waves arrived, which was 10:17 a.m. from the S wa ...
Unit 3: Earthquakes Intro Slideshow Notes
... properties of the material through which the waves travel (medium). Higher density media result in a higher velocity of wave propagation. ...
... properties of the material through which the waves travel (medium). Higher density media result in a higher velocity of wave propagation. ...
Where do earthquakes appear?
... • For hundreds of millions of years, the forces of plate tectonics have shaped the Earth as the huge plates that form the Earth’s surface move slowly over, under and past each other. Sometimes the movement is gradual. At other times, the plates are locked together, unable to release the accumulating ...
... • For hundreds of millions of years, the forces of plate tectonics have shaped the Earth as the huge plates that form the Earth’s surface move slowly over, under and past each other. Sometimes the movement is gradual. At other times, the plates are locked together, unable to release the accumulating ...
Sample Unit of Study - New York Science Teacher
... 6. Describe how we can measure the speed of plate motions. Learning Experiences: 1. Aim: What is the size and shape of our planet? Activity: Eratoshene’s calculations 2. Aim: What is the structure of our planet? Activity: Diagram of Earth’s structure 3. Aim: What is the composition of our planet (an ...
... 6. Describe how we can measure the speed of plate motions. Learning Experiences: 1. Aim: What is the size and shape of our planet? Activity: Eratoshene’s calculations 2. Aim: What is the structure of our planet? Activity: Diagram of Earth’s structure 3. Aim: What is the composition of our planet (an ...
Unit 2 Earth Structures 1. The movement of tectonic plates is so slow
... 9. Which compositional layer of Earth is the thinnest? S.C.7.E.6.1 A. the inner core B. the outer core C. the crust D. the mantle 10. Earth has five layers based on physical properties: the inner core, the outer core, the mesosphere, the asthenosphere, and the lithosphere. Which of these layers do t ...
... 9. Which compositional layer of Earth is the thinnest? S.C.7.E.6.1 A. the inner core B. the outer core C. the crust D. the mantle 10. Earth has five layers based on physical properties: the inner core, the outer core, the mesosphere, the asthenosphere, and the lithosphere. Which of these layers do t ...
(2008) Stress-forecasting not predicting earthquakes: A paradigm shift
... can be predicted. The most sensitive diagnostic of low-level changes of stress in in situ rock, variations in microcrack geometry, can be monitored by analyzing shear-wave splitting. The suggested paradigm shift is that, instead of investigating the source zone, we monitor stress accumulation before ...
... can be predicted. The most sensitive diagnostic of low-level changes of stress in in situ rock, variations in microcrack geometry, can be monitored by analyzing shear-wave splitting. The suggested paradigm shift is that, instead of investigating the source zone, we monitor stress accumulation before ...
Locating an Epicenter Model Answers for Analyze and Conclude
... 1. Of the three cities listed in the data table, the seismographs in Denver would have detected the earthquake first. Because Denver is the closest of the three, the seismic waves would reach it first, then Seattle, then Houston. You can see this on the map, but you can also tell by looking at the d ...
... 1. Of the three cities listed in the data table, the seismographs in Denver would have detected the earthquake first. Because Denver is the closest of the three, the seismic waves would reach it first, then Seattle, then Houston. You can see this on the map, but you can also tell by looking at the d ...
Seismic Waves and Earth`s Interior
... Locating an Earthquake Distance to an Earthquake – The P-S separation determines the epicentral distance, or distance to a quake’s epicenter from the seismic station that recorded the waves. – By measuring the separation on a seismogram as well as the distance on a travel-time graph at which the P-c ...
... Locating an Earthquake Distance to an Earthquake – The P-S separation determines the epicentral distance, or distance to a quake’s epicenter from the seismic station that recorded the waves. – By measuring the separation on a seismogram as well as the distance on a travel-time graph at which the P-c ...
Earthquake handout
... According to the United States Geological Society, of the half a million detectable earthquakes each year ninety percent occur around the pacific seismic belt. In this zone the 1995 Kobe earthquake in Japan resulted in the deaths of over 5,000 people. In 2010 one of the largest earthquakes ever ...
... According to the United States Geological Society, of the half a million detectable earthquakes each year ninety percent occur around the pacific seismic belt. In this zone the 1995 Kobe earthquake in Japan resulted in the deaths of over 5,000 people. In 2010 one of the largest earthquakes ever ...
Earthquake
An earthquake (also known as a quake, tremor or temblor) is the perceptible shaking of the surface of the Earth, which can be violent enough to destroy major buildings and kill thousands of people. The severity of the shaking can range from barely felt to violent enough to toss people around. Earthquakes have destroyed whole cities. They result from the sudden release of energy in the Earth's crust that creates seismic waves. The seismicity, seismism or seismic activity of an area refers to the frequency, type and size of earthquakes experienced over a period of time.Earthquakes are measured using observations from seismometers. The moment magnitude is the most common scale on which earthquakes larger than approximately 5 are reported for the entire globe. The more numerous earthquakes smaller than magnitude 5 reported by national seismological observatories are measured mostly on the local magnitude scale, also referred to as the Richter magnitude scale. These two scales are numerically similar over their range of validity. Magnitude 3 or lower earthquakes are mostly almost imperceptible or weak and magnitude 7 and over potentially cause serious damage over larger areas, depending on their depth. The largest earthquakes in historic times have been of magnitude slightly over 9, although there is no limit to the possible magnitude. The most recent large earthquake of magnitude 9.0 or larger was a 9.0 magnitude earthquake in Japan in 2011 (as of March 2014), and it was the largest Japanese earthquake since records began. Intensity of shaking is measured on the modified Mercalli scale. The shallower an earthquake, the more damage to structures it causes, all else being equal.At the Earth's surface, earthquakes manifest themselves by shaking and sometimes displacement of the ground. When the epicenter of a large earthquake is located offshore, the seabed may be displaced sufficiently to cause a tsunami. Earthquakes can also trigger landslides, and occasionally volcanic activity.In its most general sense, the word earthquake is used to describe any seismic event — whether natural or caused by humans — that generates seismic waves. Earthquakes are caused mostly by rupture of geological faults, but also by other events such as volcanic activity, landslides, mine blasts, and nuclear tests. An earthquake's point of initial rupture is called its focus or hypocenter. The epicenter is the point at ground level directly above the hypocenter.